I have a 2016 Cab Chassis 3500 Crew Cab Duramax with just now 23k for miles.
I just had my first issue with my dual tank set up. I used to fill the front first but it always spit fuel back after 4 or 5 gallons so I just always filled the rear. I filled up yesterday as normal I typically don't shut off the engine when traveling unless I absolutely have. After filling up I drove about 10 miles then the engine threw a code DTC P2636. The check engine light came on, the DTC said low fuel and the gage dropped to Empty.
I called the local dealer as I was out of town traveling home and they were no help, finally called another dealer and he said to just keep the front tank full and I should make it home. So I stopped a couple times and squeezed in some fuel.
Took it to the dealer this morning and I asked about the recall on the fuel transfer that was done in June 18, about 10k miles ago. He said it was done I asked then what went wrong he said it was I did not shut the truck off and fuel the front tank that caused the problem. That does not make any sense to me, what sensor would know that I was fueling other than the gauge, and why would it matter what tank, as I was told that the recall was to by the pump.
Before this truck I had the exact truck except it was a 2006, it was dual tank etc.. I never had any issues with it but a turbo code on a trip to Maine and the dealer replaced it (turbo) around 92K.
Someone enlighten me.